Gull pricing analyst Rohan Mehta said Gull did not make any money from the low price last night, as it was more like "giving it away".
Mehta said the station was about to replace the tanks and it needed to get rid of the fuel.
"We wanted to make sure all the fuel was gone."
Mehta said the price dropped about 7.30pm and it quickly became frantic.
It was "a little bit" of a surprise how many people turned up to make the most of the offer.
"It was never our intention to grab the public's attention," he said.
But he said that was more likely to happen these days because of social media.
When asked if they would consider doing it again Mehta said it all depended on whether or not it would be feasible.
"That's something we would have to discuss."